Volume 18, Issue 3 (12-2025)
ijhe 2025, 18(3): 489-504 |
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Dianati Tilaki R, Kaseb R, Babanejad Arimi E, Dianati M. Benzene removal from air using Bi2O3–TiO2 photocatalyst coated on glass foam under ultraviolet light irradiation. ijhe 2025; 18 (3) :489-504
URL: http://ijhe.tums.ac.ir/article-1-7052-en.html
URL: http://ijhe.tums.ac.ir/article-1-7052-en.html
1- Department of Environmental Health Engineering, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran , dianati.tilaki@gmail.com
2- Department of Environmental Health Engineering, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran
3- Department of Thermokinetics and Catalysis, Faculty of Chemical Engineering, Noushirvani University of Technology, Babol, Iran
2- Department of Environmental Health Engineering, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran
3- Department of Thermokinetics and Catalysis, Faculty of Chemical Engineering, Noushirvani University of Technology, Babol, Iran
Abstract: (519 Views)
Background and Objective: Benzene is a carcinogenic volatile organic compound commonly found in polluted air. This study aimed to remove benzene from air using a TiO₂–Bi2O₃ composite photocatalyst immobilized on glass foam under ultraviolet (UV) light irradiation.
Materials and Methods: Glass foam coated with the TiO₂– Bi2O₃composite was placed in a quartz reactor, which was connected to an air pump inside a sealed glass chamber. A UV lamp (254 nm) was installed next to the reactor. Known volumes (µL) of benzene were injected into the chamber through a septum. When the pump was activated, benzene-contaminated air passed through the photoreactor. Benzene concentration was measured by collecting air samples from the chamber and analyzing them using a GC-FID device.
Results: XRD spectra and SEM images confirmed the presence of TiO₂ and Bi2O₃, while BET analysis verified the mesoporous structure of the composite photocatalyst. The surface adsorption of benzene by the composite was 15% and followed the Langmuir model. The process kinetics were first-order, and the removal efficiency decreased with increasing benzene concentration. At a benzene concentration of 39 ppm, the removal efficiency after 75 minutes of TiO₂ and UV irradiation was 75%, whereas for TiO₂– Bi2O₃ under similar conditions, the efficiency increased to approximately 90%.
Conclusion: Using a TiO₂– Bi2O₃ composite photocatalyst under UV-A irradiation improved benzene removal efficiency by about 15% compared with TiO₂alone.
Materials and Methods: Glass foam coated with the TiO₂– Bi2O₃composite was placed in a quartz reactor, which was connected to an air pump inside a sealed glass chamber. A UV lamp (254 nm) was installed next to the reactor. Known volumes (µL) of benzene were injected into the chamber through a septum. When the pump was activated, benzene-contaminated air passed through the photoreactor. Benzene concentration was measured by collecting air samples from the chamber and analyzing them using a GC-FID device.
Results: XRD spectra and SEM images confirmed the presence of TiO₂ and Bi2O₃, while BET analysis verified the mesoporous structure of the composite photocatalyst. The surface adsorption of benzene by the composite was 15% and followed the Langmuir model. The process kinetics were first-order, and the removal efficiency decreased with increasing benzene concentration. At a benzene concentration of 39 ppm, the removal efficiency after 75 minutes of TiO₂ and UV irradiation was 75%, whereas for TiO₂– Bi2O₃ under similar conditions, the efficiency increased to approximately 90%.
Conclusion: Using a TiO₂– Bi2O₃ composite photocatalyst under UV-A irradiation improved benzene removal efficiency by about 15% compared with TiO₂alone.
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